Surface for a chair back



FIG. 1 is a rear elevational view of the surface for a chair back wherein the outline of the chair is shown in dotted outline;

FIG. 2 is a perspective view of the rear and one side of the surface for a chair back of FIG. 1.

The fragmented crossed lines represent fabric and is understood to be continuous throughout. The broken lines on the pockets and the straps represent stitching. 

The ornamental design for a surface for a chair back, as shown and described. 